865389349 has 4 divisors (see below), whose sum is σ = 944061120. Its totient is φ = 786717580.

The previous prime is 865389341. The next prime is 865389359. The reversal of 865389349 is 943983568.

865389349 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 865389349 - 2³ = 865389341 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 865389349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865389341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39335869 + ... + 39335890.

It is an arithmetic number, because the mean of its divisors is an integer number (236015280).

Almost surely, 2^865389349 is an apocalyptic number.

It is an amenable number.

865389349 is a deficient number, since it is larger than the sum of its proper divisors (78671771).

865389349 is a wasteful number, since it uses less digits than its factorization.

865389349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78671770.

The product of its digits is 5598720, while the sum is 55.

The square root of 865389349 is about 29417.5007266083. The cubic root of 865389349 is about 952.9508795523.

The spelling of 865389349 in words is "eight hundred sixty-five million, three hundred eighty-nine thousand, three hundred forty-nine".